Science Variables 2

A researcher did an investigation to see if corn seeds would sprout at different times depending on the temperature of the water in which they were placed.  What is the independent variable?

• How long to sprout
• type of seed used
• water temperature
• how much water used

Tags

NGSS.MS-LS1-5

A study was done to see if different tire treads affect the braking distance of a car.
What is the dependent variable?

• Tire treads
• Braking distance
• Road conditions
• Model of car

The higher the temperature in an oven, the faster a cake will bake.
What is the independent variable?

• Cake flavor
• Temperature
• Time
• Type of oven

I believe the number of lemons produced by a lemon tree increases when the tree receives more water.
This statement is 

• A hypothesis
• A law
• A variable
• A conclusion

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Bees have been dying at an unprecedented rate for the last decade.  Scientists believe it is due to a family of chemicals called neonicotinoids which has seen increasing use recently.
How would you classify the first statement above?

• A hypothesis
• A law
• An observation
• Quantitative data

An investigation found that more potatoes would be produced on a farm if the soil was fertilized more.

What is a controlled variable or constant in this experiment?

• Number of potatoes

• Amount of fertilizer

• Science

• The location of the farm

Tags

NGSS.MS-ETS1-1

Students measured the temperature of the water at different depths in Lake Skywalker and found that the temperature varied.
What was the dependent variable?

• Time
• Temperature
• Student taking the measurement
• Water depth

Tags

NGSS.MS-PS1-4

The amount of energy that water takes to boil will change with the volume of water.  
What would you graph on the X axis for the above statement?

• Boiling temperature
• Amount of water
• Amount of energy
• Flavor of ramen noodles

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Identify the INDEPENDENT VARIABLE: You experiment to see if a bouncy ball or a tennis ball bounces higher.

• Type of ball

• Same drop height

• Height of bounce

• Same surface

Identify the DEPENDENT VARIABLE: You experiment to see if the type of liquid changes how fast it can drain out of the tornado tube

• Amount of liquid

• Type of liquid

• Technique of swirl

• Speed to drain